I use an energy meter (Eltako WSZ15D-65A) to see, what my whirlpool consumes (spoiler: A LOT!) and my gas provider installed a “BK4” gas meter, which I’d like to read out also.
For that you’ll need:
- Eltako WSZ15D-65A or any other energy meter with an S0 interface
- elster IN-Z61 (or similar) for the gas meter, which basically is a reed contact
- basically every other S0 counter will work
- ESP8266 (I use a D1 Wemos)
- bit of cables
How to put that stuff together I have explained here:
Now, the ESP sends the values to MQTT, so we just need to create MQTT-Things for each information, we like to have in openHAB and link it to a item:
You should have an MQTT-broker thing (called mqttbroker) already in openHAB (or just rename it in the code)
UID: mqtt:topic:mqttbroker:S0counter
label: MQTT S0 Counter
thingTypeUID: mqtt:topic
configuration: {}
bridgeUID: mqtt:broker:mqttbroker
channels:
- id: GasCount
channelTypeUID: mqtt:number
label: Gas Pulses
description: null
configuration:
stateTopic: openHAB/S0Counter/Gas/Count
- id: GasTotal
channelTypeUID: mqtt:number
label: Gas Total
description: null
configuration:
commandTopic: openHAB/S0Counter/Gas/Total
retained: true
- id: GasTime
channelTypeUID: mqtt:number
label: Gas Time
description: null
configuration:
commandTopic: openHAB/S0Counter/Gas/Time
retained: true
- id: GasWatts
channelTypeUID: mqtt:number
label: Gas Watts
description: null
configuration:
commandTopic: openHAB/S0Counter/Gas/W
retained: true
- id: WhirlpoolCount
channelTypeUID: mqtt:number
label: WhirlpoolPulses
description: null
configuration:
stateTopic: openHAB/S0Counter/Whirlpool/Count
- id: WhirlpoolTotal
channelTypeUID: mqtt:number
label: WhirlpoolTotal
description: null
configuration:
commandTopic: openHAB/S0Counter/Whirlpool/Total
retained: true
- id: WhirlpoolTime
channelTypeUID: mqtt:number
label: WhirlpoolTime
description: null
configuration:
commandTopic: openHAB/S0Counter/Whirlpool/Time
retained: true
- id: WhirlpoolWatts
channelTypeUID: mqtt:number
label: Whirlpool Watts
description: null
configuration:
commandTopic: openHAB/S0Counter/Whirlpool/W
retained: true
Now just link the Channels to items and you’re good to go!